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【单选题】
当细胞以不正常方式分裂时，肿瘤就可能形成。酶是加速或催化机体化学反应的蛋白质。研究人员发现，如果对有丝分裂激酶的活动不加以控制，细胞无节制分裂，就会导致肿瘤形成。但如果用化学抑制剂阻止它们的活动，细胞就不再分裂，癌细胞也就不能扩散。 这段文字主要讲述的是( )。A.
肿瘤形成的原因
B.
治疗癌症的新途径
C.
有丝分裂激酶与肿瘤形成的关系
D.
酶对细胞分裂所产生的作用
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【简答题】How many hours is the store open every day during its sale days? ______ hours.
【单选题】—Could you please show me how to get to the furniture store? — Sure, _____ the escalator to the second floor, _____ left and you'll see it. [ ]
A.
sit, take
B.
catch, turn
C.
take, turn
【单选题】- ______ has this food store been here? -Since 2001. [ ]
A.
How long
B.
How often
C.
How old
D.
How soon
【单选题】How‘s the convenience store sector doing in Japan? 查看材料
A.
The article doesn't say.
B.
It's doing great.
C.
Not very well.
D.
Cannot see clearly.
【单选题】How to store the leftovers in the fridge? ( )
A.
Store them in sealed containers for up to two days in the fridge.
B.
Store them in the fridge up to 2 months.
C.
Refrigerate the leftovers directly in the fridge.
D.
Reheat them at the temperature of 75 ° F.
【单选题】— How _____________ is it to the store? — About 1 kilometre. [ ]
A.
old
B.
far
C.
tall
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